Sewn again the official firmware, nothing has changed - both lost Inet from wi-fi and disappears. Especially quickly this happens if you use wi-fi and gps simultaneously, such as Yandex.Maps.
And in my opinion worsened receiving the GPS-Glonass satellites.
For the sake of interest I removed the cover 3 contacts found for antennas:
DIV-ANT
WGB-ANT
MAIM-ANT
Who knows what is responsible for what?) DIV-ANT and WGB-ANT contacts cling to the antenna in the Kras, what happened to them that without them, the phone catches the same !!! What I have is a suspicion for which they then?)